import { asyncRouterMap, constantRouterMap } from '@/router'
import store from '@/store'

/**
 * 通过meta.role判断是否与当前用户权限匹配
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  }
  return true
}

/**
 * 递归过滤异步路由表，返回符合用户角色权限的路由表
 * @param asyncRouterMap
 * @param roles
 */
function filterAsyncRouter(asyncRouterMap, roles) {
  const accessedRouters = asyncRouterMap.filter(route => {
    if (hasPermission(roles, route)) {
      if (route.children && route.children.length) {
        route.children = filterAsyncRouter(route.children, roles)
      }
      return true
    }
    return false
  })
  return accessedRouters
}

const routerMap = {
  state: {
    routers: constantRouterMap,
    addRoutes: []
  },
  mutations: {
    HANLDE_ISEXPAND(state) {
      state.isExpand = !state.isExpand
    },
    SET_ROUTERS(state, routes) {
      state.addRoutes = routes
      state.routers = state.routers.concat(routes)
    }
  },
  actions: {
    GenerateRoutes({ commit }, playload) {
      return new Promise(resolve => {
        const { roles } = playload
        let accessedRouters
        if (roles.includes('admin')) {
          accessedRouters = asyncRouterMap
        } else {
          accessedRouters = filterAsyncRouter(asyncRouterMap, roles)
        }
        commit('SET_ROUTERS', accessedRouters)

        resolve(accessedRouters)
      })
    }
  }
}

export default routerMap